<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>旋转吧！小宇宙</title>
  <style>
    div {
      width: 100px;
      height: 100px;
      background-image: url('https://user-gold-cdn.xitu.io/2018/10/30/166c3fd3666b5d05?imageView2/1/w/180/h/180/q/85/format/webp/interlace/1');
      background-repeat: no-repeat;
      background-size: 100px 100px;
      border-radius: 50%;
    }

    div:hover {
      transform: rotate(666turn);
      transition: all 159s 1s ease-in-out;
      ;
    }
  </style>
</head>

<body>
  <div></div>
</body>

</html>